Please help...?

Okay I did something really dumb... without thinking, I washed a white sweatshirt with a dark towel in a load of laundry and even after drying it, there are tiny dark lint all over my sweatshirt. I tried drying it a second time, and that didnt work. Then I tried using a lint roller, and it didnt pick them up since they're so small. But they still stand out, and I was wondering if anyone knew how to get rid of them? Thanks!